B3311331313231311331322331333131133132333132333133313223313231333121221   >>    B331133131323131133132233133313113313233313233313331322331323133312122   <<    B3311331313231311331322331333131133132333132333133313223313231333121223   >>      B3311331313231311331322331333131133132333132333133313223313231333121222   >>